Unity 2020.3.22 Editor + Vulkan API = SoftMaskable shader error

mob-sakai / SoftMaskForUGUI

Enhance Unity UI (uGUI) with advanced soft-masking features to create more visually appealing effects!

MIT License

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This part of code from SoftMask.cginc produces shader error in Editor if Vulkan API is selected.

Code:

       #if SOFTMASK_EDITOR
    alpha *= step(0, view.x) * step(view.x, 1) * step(0, view.y) * step(view.y, 1);
    #endif

Error:

Shader error in 'Hidden/UI/Default (SoftMaskable)': Program 'frag', error X8000: D3D11 Internal Compiler Error: Invalid Bytecode: Incompatible min precision type for operand #1 of opcode #76 (counts are 1-based). Expected int or uint. at line 49 (on vulkan)

Solution:

Update this part code with float usage, instead of fixed2. For example

        #if SOFTMASK_EDITOR
    float2 tview = float2(view.x, view.y);
    alpha *= step(0, tview.x) * step(tview.x, 1) * step(0, tview.y) * step(tview.y, 1);
    #endif

mob-sakai / SoftMaskForUGUI

Unity 2020.3.22 Editor + Vulkan API = SoftMaskable shader error #129